There are many career options for a person with a master's degree in Biochemistry. Here is an example of alumni stories and careers from Georgetown University's M.S. in Biochemistry program: https://msbiochemistry.georgetown.edu/Featured%20Alumni
Many alumni of these programs pursue business careers in the biotech sector, in the pharmaceutical industry, and in advisory consulting services, to name a few options. Medical school, doctoral degree programs, dental school, and pharmacy school are other academic options.